Sugar daddy? Cougar? No matter what we label older man-younger woman, younger man-older woman couples, they may be rarer than Hollywood would have us think. Interestingly, in a review of data from Facebook, which pulled the ages of heterosexual couples, most people in America and other developed countries tend to be in relationships with people close to their own age.

Among Facebook couples, men, on average, are about 2.4 years older than their wives or girlfriends. And the most common couple (67 percent) tended to be composed of just that, a man who was slightly older than the woman in his life. Rarer couple configurations included older women and younger men (20 percent of couples), or partners who are the same age (just 13 percent).

As people get older, however, the age gap widens. In other words, when you're in your 40s and 50s and beyond, you're more likely (according to these statistics anyway) to fall in love with someone a decade or more apart from you in age.

Interesting, yes. But are we the only ones somewhat mind-boggled by how much Facebook knows about our love interests? Where's the "dislike" button when we need it?!